What the value of the numerical expression 5/8-5/12(3-1/2)+2/3?

0.25

think of P.E.M.D.A.S

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)